Alert archive / Nebraska / Mesoscale Discussions in 2018
Mesoscale Discussion 1189
The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2018, 6:38 PM MDT for 7 counties in Nebraska; Fall River County, South Dakota; 7 counties in Wyoming. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2018, 6:38 PM MDT (00:38 UTC)
- Expired
- Jul 28, 2018, 8:15 PM MDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
Counties Banner County, NE, Box Butte County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Fall River County, SD, Campbell County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Cheyenne radar (KCYS), 191 km from the middle of the area, began a volume at 00:38 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 0.6 hours before the alert went out and 298 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 604 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 2480 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.7
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 9:46 PM MDT | Mesoscale Discussion | SPC | Dundy, Hayes, Hitchcock, Red Willow | 89 min |
| Jul 29, 12:46 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 12 more | 59 min |
| Jul 29, 1:07 PM MDT | Tornado Watch | SPC | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 8 hr |
| Jul 29, 1:34 PM MDT | Severe Thunderstorm Watch | SPC | Arthur, Chase, Cherry, Deuel, Dundy, Garden and 11 more | 7 hr |
| Jul 29, 4:07 PM MDT | Mesoscale Discussion | SPC | Arthur, Chase, Cherry, Dundy, Frontier, Garden and 12 more | 53 min |
| Jul 29, 5:23 PM MDT | Mesoscale Discussion | SPC | Banner, Box Butte, Cheyenne, Dawes, Deuel, Dundy and 5 more | 67 min |
| Jul 29, 1:12 PM MDT | Mesoscale Discussion | SPC | Butte, Lawrence | 2 hr |
| Jul 29, 2:20 PM MDT | Mesoscale Discussion | SPC | Laramie | 55 min |
Nearby
Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Wyoming, 2018Mesoscale Discussions in South Dakota, 2018Every mesoscale discussion in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.